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Discuss Two PIR sensors to work same lights in the Electrical Forum area at ElectriciansForums.net

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Hi all

Does anyone know of PIR sensors that can be connected to switch on the same lights.
Basically, i need to install 2 sensors located around the corner from each other and either of these two sensors need to switch on 4 led wall lights.
Spoke to Knightsbridge, they say that this can't be done as you would be sending a switched live back down to the other sensor that hasn't activated.

Has anyone installed PIR's like this without any issues? If so, what ones have you installed?

Thanks for any input.
 
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happyhippydad

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I have done exactly the above with the standalone sensors from screwfix and they have been working fine for around 4 years now. They switch approx 10 x LED's going up a pathway.
lights.jpg
 

telectrix

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so what's wrong with sending a S/L to the other PIR. it won't explode.
 

TJ Anderson

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Hi all

Does anyone know of PIR sensors that can be connected to switch on the same lights.
Basically, i need to install 2 sensors located around the corner from each other and either of these two sensors need to switch on 4 led wall lights.
Spoke to Knightsbridge, they say that this can't be done as you would be sending a switched live back down to the other sensor that hasn't activated.

Has anyone installed PIR's like this without any issues? If so, what ones have you installed?

Thanks for any input.
As long as the total load of lights does not exceed the switched rating of one of the PIR'S then there is no problem in paralleling the outputs from them.
 

TJ Anderson

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I have done exactly the above with the standalone sensors from screwfix and they have been working fine for around 4 years now. They switch approx 10 x LED's going up a pathway.
View attachment 48040
Hi HHH. Am I reading your drawing correct? It looks like your timer output is in parralel with your PIR outputs. Is that what you wanted? PIR operation with a timed override?
 

happyhippydad

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Hi HHH. Am I reading your drawing correct? It looks like your timer output is in parralel with your PIR outputs. Is that what you wanted? PIR operation with a timed override?
The customer wanted them to come on at a certain time in the evening and then switch off, but also wanted them to be constantly (at night) on a PIR from top of drive and bottom of drive.
 

SparkyChick

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I know Luxomat sensors are quite happy having power fed into the switched live output.

Depending on the area you are covering though, you can get corner sensors that look all around.
 
Nothing wrong with that unless Knightsbridge are suggesting the 'inrush current' maybe a problem and not because of sending a s/l back to the other sensor.
When they start 'playing up', (they invariably do!), you get the ladder up to investigate the sensor and it will always be the other one!
 
so what's wrong with sending a S/L to the other PIR. it won't explode.
I have installed some pir floods before that didn't play well together, they were suppose to share a SW live so they could turn each other on but they would flash repeatedly when ''back feeding' each other.

I have no idea what caused it but I'm going to take a stab in the dark and say back feeding the SW live side of PCB makes a relay chatter.
 

Marvo

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I have installed some pir floods before that didn't play well together, they were suppose to share a SW live so they could turn each other on but they would flash repeatedly when ''back feeding' each other.

I have no idea what caused it but I'm going to take a stab in the dark and say back feeding the SW live side of PCB makes a relay chatter.
Probably a solid state switch on the output rather than a relay.
 

ackbarthestar

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Yes, I have three of them on one circuit around the house controlling six LED 15W wall lights. I also have an overide switch for manual operation, never needed to use it as the misses doesn't spend too much time collecting firewood from the shed.
They have been up and running without incident for the last 2 years.
 
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